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Preparation of Calcium Carbonate with High Purity by using Ammonium Chloride Process and Ammonium Nitrate Process  

Kang Mee-Sook (Department of Food & Drug Analysis, Jeollabukdo Institute of Health & Environmental Research)
Soh Gowan-Soon (Department of Environmental Hygiene, Gunsan City)
Shin Dong-Hwa (Faculty of Biotechnology (Food Science & Technology Major), Chonbuk National University)
Publication Information
Journal of Food Hygiene and Safety / v.19, no.4, 2004 , pp. 203-208 More about this Journal
Abstract
The shells of Anadarac tegillarca granosa, Crassostrea gigas, Crassostrea nippona, and Patinopecten yessoensis were used for preparation of calcium carbonate with high purity. Calcium content in ash of shell was the highest $64.9\%$ in Anadarac tegillarca granosa ashed for 5 hr at $900^{\circ}C$, and followed as Patinopecten yessoensis $62.5\%$, Crassostrea gigas $62.4\%$, and Crassostrea nippona $61.5\%$. Whiteness of ash was the highest 81.6-85.8 in Patinopecten yessoensis shell. Calcium contents in calcium carbonates made with shells of Anadarac tegillarca granosa by using ammonium chloride process (ACP) and ammonium nitrate process (ANP) were higher $40.03-40.04\%$ than $39.92\%$ in Anadarac tegillarca granosa ash. Calcium content was the highest $40.04\%$ in pH adjusted calcium carbonate prepared by using ANP. Whiteness of calcium carbonate prepared by using ACP and ANP was the level of 101.0-101.5. Therefore, we estimated that the calcium carbonate made by using ACP and ANP could be used potentiality as a food additive for calcium supplement.
Keywords
calcium carbonate; shell; Anadarac tegillarca granosa; ammonium chloride process; ammonium nitrate process;
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Times Cited By KSCI : 1  (Citation Analysis)
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